A damsel is in distress and is being held captive in a tower. Her knight in shining
armor is on the ground below with a ladder. When the knight stands 15 feet from
the base of the tower and looks up at his precious damsel, the angle of elevation to
her window is 60 degrees. How long does the ladder have to be?

Can someone me with my hwplz(only the circled ones)

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)